Annals of Improbable Research (AIR)
Cover Image for Volume 4, Issue 5
This Beavis-like figure is an obsolete embryo, one of what was originally a set of twins. One ovum caused the other to be absorbed, resulting in the digestion, so to speak, of this embryo. The second embryo came to term and was delivered in good shape. Photo by Scott Lindgren, appearing here courtesy of the Mütter Museum, College of Physicians of Philadelphia, where the specimen has resided since 1874.